Home About Browse Search

Sahle, Karolina, 2021. The role of fruit and yeast volatiles in mating and oviposition of the invasive fly Drosophila suzukii. Second cycle, A2E. Alnarp: SLU, Dept. of Plant Breeding (from 130101)



Drosophila suzukii is a serious pest of soft skin fruit and berries. Despite D. suzukii niche to lay eggs in ripening fruit, they seem to have a similar association with yeast as other drosophilids. Yeast provides larvae and adult flies with essential nutrients and the flies contribute to yeast dispersal when moving between plants. Like other drosophilds D. suzukii is believed to have an association with a specific yeast flora where Hanseniaspora uvarum is known to be the predominant species. The object of this thesis has been to investigate the impact of microbial volatiles from the associated yeast H. uvarum in mating and oviposition choices for D. suzukii.

In a no-choice assay, individual couples of virgin D. suzukii flies exposed to volatiles from H. uvarum were more likely to mate during the 30-minute experiment compared to the blank control. In a second experiment to assay the effect of the minimal growth media and higher relative humidity in the H. uvarum treatment we got a weak response and no difference between treatments and control suggesting that further experiments should be conducted for solid results. Volatiles from H. uvarum or raspberries, or a combination of these, was found to evoke oviposition to an equally high extent in mated D. suzukii in absence of visual cues compared to the control. The results indicate that D. suzukii uses volatile microbial cues when deciding to mate and oviposit.

Main title:The role of fruit and yeast volatiles in mating and oviposition of the invasive fly Drosophila suzukii
Authors:Sahle, Karolina
Supervisor:Becher, Paul and Rehermann Del Rio, Guillermo
Examiner:Karlsson Green, Kristina
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2021
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:LK005 Horticultural Management Programme - Gardening and Horticultural Production, Bachelor's Programme 180 HEC
Supervising department:(LTJ, LTV) > Dept. of Plant Breeding (from 130101)
Keywords:microbial microbial, reproduction, yeast, fruit, raspberries
Permanent URL:
Deposited On:24 Apr 2024 14:28
Metadata Last Modified:25 Apr 2024 01:06

Repository Staff Only: item control page


Downloads per year (since September 2012)

View more statistics